EP 1508988 B1 20060531 - Channel identification in communications networks
Title (en)
Channel identification in communications networks
Title (de)
Kanalidentifizierung in Kommunikationsnetzwerken
Title (fr)
Identification de canaux dans des réseaux de communication
Publication
Application
Priority
- CA 2358382 A 20011005
- EP 02764461 A 20021004
- US 97299101 A 20011010
- US 6774802 A 20020208
Abstract (en)
[origin: EP1508988A2] Channels in an optical WDM network are each identified by at least two dither tones with which the channel is modulated. A modulating arrangement comprises a plurality of continuous dither tone sources and a selector for selecting at least two dither tones from the plurality in a cyclically repeated sequence. Channel detection by detecting the dither tones makes use of an FFT process which can detect the dither tones for high power channels in a single operation. <IMAGE>
IPC 8 full level
H04B 10/155 (2006.01); H04J 14/02 (2006.01)
CPC (source: EP)
H04B 10/504 (2013.01); H04B 10/505 (2013.01); H04B 10/50572 (2013.01); H04B 10/564 (2013.01); H04J 14/0227 (2013.01); H04J 14/0241 (2013.01); H04J 14/0298 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1508988 A2 20050223; EP 1508988 A3 20050316; EP 1508988 B1 20060531
DOCDB simple family (application)
EP 04027996 A 20021004